Oil feeding and discharge means for oil burners



G. W. STARK Dec. 3, 1929.

OIL FEEDING AND DISCHARGE MEANS FOR OIL BURNERS Filed May 12, 1928 gwuentoo farl Patented Dec. 3, 1929 UNITED STATES PATENT OFFICE GEORGE W. STARK, OF ASTORIA, OREGON, ASS'IGNOR OF ONE-HALF TO JOE DIMITROFF, OF ASTORIA, OREGON OIL FEEDING AND DISCHARGE MEANS FOR OIL BURNERS Application filed May 12, 1928.

This invention relates to oil burners of that type wherein the oil is injected into a furnace by means of steam pressure, the oil being drawn from the source as, for instance, from an oil tank on the injection principle.

The general object of the invention is to provide means so constructed that oil may be drawn from a tank some distance away from the burner without the necessity of using gravity as a means for causing the flow of oil or otherwise causing the flow of oil and the oil is injected into the furnace by the action of the steam jet oil injectors. 1

A further object is to provide an oil injector and burner which is very simple, which may be cheaply constructed, and which has been found to be extremely satisfactory in operation.

My invention is illustrated in the accom panying drawing, wherein Figure 1 is a side elevation of a burner constructed in accordance with my invention;

Figure 2 is a longitudinal sectional view of the burner proper.

Referring to this drawing, I will first describe the oil chamber and ejector adjacent to the burner. This is shown in Figure 2 and comprises the exterior chamber 10 contracted at its forward end, as at 11, this forward end being screw-threaded for the reception of an interiorly screw-threaded sleeve 12. This forward end or nozzle 11 is formed with a central flared bore 13 in the form of a Venturi tube, and discharges into a pipe 1a which is exteriorly screw-threaded and which carries upon its extremity the burner tip 15 having a contracted discharge opening 16. The rear end of the chamber 10 has a central opening interiorly screw-threaded, as at 17. This is closed by a plug 18 formed with an interiorly screw-threaded bore and at its rear end with an enlarged bore 19.

Having screw-threaded engagement with the small bore is the ct pipe 20 which extends centrally of the oil chamber and discharges into the flaring passage 13. A steam or air pipe 21 engages with the screw-threads 19 and the side wall of the oil chamber 10 is apertured and interiorly screw-threaded for Serial No. 277,289.

the reception of an intake pipe 22. It will be understood that the plug 18 constitutes a re ducer as well as a plug and this pipe 21 is intended to be connected to a source of steam or air or other motive fluid under pressure, while the pipe 22 is connected to an oil tank. The oil tank may be located at any desired distance away from the burner or from the furnace.

Oil may be drawn from this tank and forced. into the furnace by means of a plurality of these chambers l0 disposed in the oil line and having a plurality of the steam or air ets 20 located one in each oil chamber. Thus, for instance, I have illustrated in Figure 1 the chamber 10 discharging into the burner tip 15, which in turn discharges into the furnace. The oil pipe 22 I have illustrated as extending into the collar 12 mounted upon the chamber 1O of exactly the same character as the chamber 10, this chan'iber 10 having a pipe 22 leading therefrom into the oil tank A. this pipe bein provided with a valve B. Entering the rear end of the chamber 10 is the pipe 21 leading from the source of steam or air under pressure. The interior of the chamber 10 is, of course, provided with the steam or air jet 20, or in other words the chamber 10" has exactly the same interior construction as the chamber 10.

It will be seen that these chambers 10 and 10, as many as are used, act on the injector principle and that the discharge of steam or other fluid pressure through the jets 20 causes a vacuum within the oil chamber, which in turn draws oil into these several chambers and thus causes the oil to be withdrawn from the tank and forced along the pipe line and into the furnace. It will be seen that the power of gravity is not used for causing the feed of oil at all and that one injector helps the other injector. This mechanism may be operated either by steam or compressed air, the steam pressure required being ordinarily about five pounds. Obviously, however, the pressure may be increased up to 250 pounds.

1. A structure of the character described for drawing oil from a source and discharging the same into a furnace, comprising a ehambered body having a portion thereof formed to-provide a nozzle, said nozzle being exteriorly threaded and having a passage therethrough, centrally constricted and gradually enlarging from the constricted center to each end, means for coupling a fluid pressure line to said chamber to enter the same in alignment with the longitudinal center of said passage, a jet pipe carried by said means and extending through the'chamber into and ter- 7 minating in the passage at the constrictedportion thereof, means for introducing oil into the chamber at one side of said jet pipe, a pipe threadably attached at one end to said nozzle and a discharge burner nozzle secured to the other end of the last mentioned pipe. 2. A structure of the character described, for drawing oil from a source and discharging the same into a furnace, comprising a chambered body having an extending portion formed to provide a nozzle, said nozzle having a passage therethrough, centrally constricted and gradually enlarging from the constricted center to each end, means for coupling a fluid pressure line to said chamber to enter the same in alignment With the longitudinal center of said passage, a jet pipe carried by and extending through the chamber into and terminating in the passage in the constricted portion thereof, means for introducing oil into the chamber at one side of the jet pipe, a relatively short pipe connected to the forward end of said nozzle, said pipe being of greater interior diameter than. the adjacent end of the passage and forming a chamber into Which the'passage discharges, and a burner nozzle secured to the other end of the last mentioned pipe. In testimony whereof I hereunto aflix my signature.

GEORGE W. STARK. 

